I'm a girth lover myself. Thought I'd chime in with a few classics that haven't been mentioned, in gratitude for the rest mentioned above that I didn't know of before....
Ted Colunga has always been massively thick and uncut. I personally preferred him when he was younger and less roidy (too much muscle for me now), as in here:
Guy Parade: Ted Colunga
When he's fully erect, he's pretty unbelievable.
Also
Guy Parade: INDEX
Then there's Marco Blaze, an Argentine I believe...
Guy Parade: Marco Blaze
Finally, Brad Patton has also always impressed me with his girth...his dick is almost finlike in its thickness when fully hard...actually more like a paddle. He's towards the middle of this page:
Taco Bill's Blog: Strip
Thanks for all the other names/links, guys!
PS The guy referred to above as Ricardo Caffe goes by "Rocco Brazil" more often it seems.